Portalarium , the social and mobile game company founded by game pioneer Richard Garriott, has raised a second round of funding. Altogether, the Austin, Texas-based startup has raised $3.6 million to date. The financing includes money from m8 Capital in the United Kingdom and Founders Fund (the investment fund which includes PayPal co-founder Peter Thiel) in San Francisco.

OpenX , an online advertising company whose customers include deals service Groupon and news site Business Insider, just announced that it has raised $20 million in a fourth round of funding. The Los Angeles-based company bills itself as an open source alternative to ad serving products like Google-owned DoubleClick. In February, it launched its latest product, OpenX Enterprise , which includes both an ad server and an ad exchange

Mobile application discovery startup Appsfire closed a $3.6 million funding round from French investors Idinvest , according to a Gigaom report. Helping consumers easily find new applications that interest them is increasingly important to developers and businesses looking to distinguish their product from competitors And considering the multitude of apps emerging from Apple’s app store , the Android Marketplace and Amazon , there is a large opportunity to make money from an app discovery platform like Appsfire.

Mobile application discovery startup Appsfire closed a $3.6 million funding round from French investors Idinvest , according to a Gigaom report. Helping consumers easily find new applications that interest them is increasingly important to developers and businesses looking to distinguish their product from competitors And considering the multitude of apps emerging from Apple’s app store , the Android Marketplace and Amazon , there is a large opportunity to make money from an app discovery platform like Appsfire. Appsfire, which is available for both iOS and Android devices, seeks to provide some clarity to the sea of new apps.

Twitter may be in talks to acquire contextual keyword bidding platform AdGrok for less than $10 million, according to a TechCrunch report.

Twitter may be in talks to acquire contextual keyword bidding platform AdGrok for less than $10 million, according to a TechCrunch report. While AdGrok aims to simplify search engine marketing campaigns , the platform could be adapted and used by Twitter to help monetize promoted and trending tweets

Social bed and breakfast startup Airbnb is in the process of closing a $100 million round of funding led by venture capital firm Andreessen Horowitz that would raise the company’s valuation to more than $1 billion, according to TechCrunch . This is a significant investment for Airbnb, which has previously raised $7.8 million, and comes days after actor-turned-investor Ashton Kutcher invested a significant amount of money in the company. Kutcher, who was an early investor in Foursquare and the deal to purchase Skype back from previous owner Ebay, is increasingly being looked at in the investment world as someone to watch when it comes to predicting the next hot startup company

Social bed and breakfast startup Airbnb is in the process of closing a $100 million round of funding led by venture capital firm Andreessen Horowitz that would raise the company’s valuation to more than $1 billion, according to TechCrunch . This is a significant investment for Airbnb, which has previously raised $7.8 million, and comes days after actor-turned-investor Ashton Kutcher invested a significant amount of money in the company. Kutcher, who was an early investor in Foursquare and the deal to purchase Skype back from previous owner Ebay, is increasingly being looked at in the investment world as someone to watch when it comes to predicting the next hot startup company.

Sean Maloney, Intel ’s newly appointed president of Intel China, plans to deliver a keynote speech at the Computex trade show in Taiwan next week where he will unveil a heavy-duty effort to steer Intel into the production of low-power microprocessors. Maloney is expected to say that Intel will accelerate its efforts to make chips that are more appropriate for tablet computers, smartphones, laptops, and low-power desktops.

Reply.com on Thursday announced it had acquired fellow Bay Area firm MerchantCircle for $60 million cash and stock. The deal is expected to go through in Q3 of this year. The deal makes good sense, as MerchantCircle acts as a business directory for more than a million small businesses and Reply.com is an ad firm that targets advertising for local businesses